forebrain

Examples of forebrain in the following topics:

• Development of the Human Brain

  • The human brain is split up into three major layers: the hindbrain, the midbrain, and the forebrain.
  • It is located between the hindbrain and forebrain.
  • The forebrain has two major divisions: the diencephalon and the telencephalon.
  • It is the large and complicated forebrain that distinguishes the human brain from other vertebrate brains.
  • The telencephalon and diencephalon give rise to the forebrain, while the metencephalon and myelencephalon give rise to the hindbrain.

• Functions of the Diencephalon

  • The diencephalon ("interbrain") is the region of the vertebrate neural tube that gives rise to posterior forebrain structures.
  • In development, the forebrain develops from the prosencephalon, the most anterior vesicle of the neural tube that later forms both the diencephalon and the telencephalon.
  • $$Subdivisions of the embryonic vertebrate brain that later differentiate into forebrain, midbrain, and hindbrain structures.

• Pons

  • The pons is a relay station between the forebrain and cerebellum that passes sensory information from the periphery to the thalamus.
  • The pons contains nuclei that relay signals from the forebrain to the cerebellum, along with nuclei that regulate sleep, respiration, swallowing, bladder control, hearing, equilibrium, taste, eye movement, facial expressions, facial sensation, and posture.

• Anencephaly

  • Anencephaly (absence of forebrain and neocortex) is a neural tube defect occurring during embryonic development.
  • Strictly speaking, the translation of the Greek term to English is "no brain" (that is, totally lacking), but it is accepted that children with this disorder are born without a forebrain, the largest part of the brain consisting mainly of the cerebral hemispheres, including the neocortex, which is responsible for higher-level cognition, i.e. thinking.
  • Strictly speaking, the translation of the Greek term to English is "no brain" (that is, totally lacking), but it is accepted that children with this disorder are born without a forebrain, the largest part of the brain consisting mainly of the cerebral hemispheres, including the neocortex, which is responsible for higher-level cognition, i.e. thinking.

• Lower-Level Structures

  • It is the more recent layers of the brain (the forebrain) which are responsible for the higher-level cognitive functioning (language, reasoning) not strictly necessary to keep a body alive.
  • The pons connects the medulla oblongata with the midbrain region, and also relays signals from the forebrain to the cerebellum.
  • The midbrain is located between the hindbrain and forebrain, but it is actually part of the brain stem.
  • The diencephalon is the region of the embryonic vertebrate neural tube that gives rise to posterior forebrain structures.
  • Because nearly all sensory information passes through the thalamus it is considered the sensory "way station" of the brain, passing information on to the cerebral cortex (which is in the forebrain).

• Clusters of Neuronal Cell Bodies

  • One exception is the basal ganglia which are located not in the periphery but rather in the forebrain.

• Fourth Week of Development

  • Superior to the mesencephalon is the prosencephalon (future forebrain) and inferior to it is the rhombencephalon (future hindbrain).

• Cholinergic Neurons and Receptors

  • When cholinergic neurons in the basal forebrain are lesioned, animals' ability to detect visual signals was robustly and persistently impaired.
  • An example of a central cholinergic area is the nucleus Basilis of Meynert in the basal forebrain.

• Cerebral Lobes

  • Dopamine tends to limit and select sensory information that the thalamus sends to the forebrain.
  • Located in the rearmost portion of the skull, the occipital lobes are part of the forebrain.

• Amoebic Meningoencephalitis

  • When this occurs, it then migrates through the cribiform plate and into the olfactory bulbs of the forebrain, where it multiplies itself greatly by feeding on nerve tissue.